More cleanup improvements
This MR:
- Hooks the execution of an automatic cleanup action to the successful execution of the build step in nightlies
- Provides a manual action to trigger the cleanup.
- Makes the clean-betas action a bit more selective on which types of packages it should be cleaning-up (e.g. if running Bob nightlies, do not cleanup BEAT packages, and vice-versa)
Edited by André Anjos